| 摘要 |
In order, in a drive for clamping jaws (15 to 26) which are guided in radial guides (3 to 14) of a faceplate (2) and which can be clamped hydraulically against a workpiece, to make it possible to obtain an automatic centric clamping of machined workpieces, each clamping jaw (15 to 26) is assigned a synchronous cylinder (38) as a power unit, a synchronous cylinder (39) as a pump and a switching combination (40), there being provided at least one controllable actuating device (41) which actuates each synchronous cylinder (39) used as a pump. <IMAGE>
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